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Tag: "shorter" at biology news

Whole-genome study at Johns Hopkins reveals a new gene associated with abnormal heart rhythm

...ed up more frequently in people who have longer or shorter QT intervals than in those with normal QT intervals. To do this, they examined the DNA sequences of both long and short QT people. The human genome contains 3 billion letters, known as nucleotides. Each person's genome differs from the next person's ...

Hormonal male contraception reversible after few months for all men

...tes of recovery including older age, Asian origin, shorter treatment duration, and higher sperm concentrations at baseline. Although these factors modulated the speed of recovery, spermatogenesis recovered to levels compatible with fertility in all men. Dr Liu and colleagues comment: "Our data provide stron...

Sequencing our seas

...ith the ability to sequence vast amounts of DNA in shorter time periods, the science is pressing forward. DeLong and his colleagues saw a unique opportunity for a "proof-of-principle" study by combining new microbial genomic profiles with decades of data collected at Station ALOHA, a National Science Founda...

Wyoming cloud seeding experiment begins this month

...ith the ability to sequence vast amounts of DNA in shorter time periods, the science is pressing forward. DeLong and his colleagues saw a unique opportunity for a "proof-of-principle" study by combining new microbial genomic profiles with decades of data collected at Station ALOHA, a National Science Founda...

Vaccine provides 100 percent protection against avian flu virus in animal study

...ith the ability to sequence vast amounts of DNA in shorter time periods, the science is pressing forward. DeLong and his colleagues saw a unique opportunity for a "proof-of-principle" study by combining new microbial genomic profiles with decades of data collected at Station ALOHA, a National Science Founda...

MIT chemist discovers secret behind nature's medicines

...he typical amino acids was substituted with a much shorter one. That smaller substitute leaves more room in the active site -- enough space for the halide, in this case a chloride ion, to casually slip inside and bind to the iron, without the grand theatrics chemists had anticipated. After the iron and the ...

'Uniquely human' component of language found in gregarious birds

...ings? Remarkably, after learning the patterns with shorter songs made up of two pairs of rattles and warbles, the birds were able to recognize strings containing 6-to-8 song elements (abababab ?vs ?aaaabbbb). The finding that starlings can grasp these grammatical rules shows that other animals share basic ...

Evidence for omega 3 fats less conclusive than we thought, say experts

...tty acids, found in oily fish and fish oils, and a shorter chain omega 3, found in some plant oils, is thought to protect against heart disease. UK guidelines encourage the general public to eat more oily fish, and higher amounts are advised after a heart attack. Researchers analysed 89 studies (48 randomis...

Junk DNA may not be so junky after all

... allowing researchers to study more sequences in a shorter period of time. Using this, they identified several human enhancers able to control expression consistent with the zebrafish ret gene. Zebrafish have become the ideal system for doing these types of large scale studies. They are small - only about a...

Infused spleen cells found not to impact islet recovery and reversal of type 1 diabetes in mice

... allowing researchers to study more sequences in a shorter period of time. Using this, they identified several human enhancers able to control expression consistent with the zebrafish ret gene. Zebrafish have become the ideal system for doing these types of large scale studies. They are small - only about a...

Hooked on fishing, and we're heading for the bottom, says scientist

...re than 500 scientific articles, book chapters and shorter contributions, and authored, or (co-)edited about 30 books and reports. He was elected to the Royal Society of Canada in 2003. He says receiving the prize was one additional push to move his message from the open sea to the political beachhead. But ...

Warbling whales speak a language all their own

...hat is used to analyze bird songs, which are often shorter and simpler in structure than humpback whale songs. The Markov model proved inadequate for the whale song's complex structure. Information theory, in contrast, proved perfect for analyzing humpback whale songs because it provided a quantitative ana...

Losing sleep undoes the rejuvenating effects new learning has on the brain

...tive function. Sleep-restricted individuals have a shorter attention span, impaired memory, and a longer reaction time. "Sleep is necessary for general health, but it now appears that the brain needs sleep more than any other part of the body," Hairston said. Previous studies have shown that the hippocampus...

Study shows that cells have a natural defense against HIV

...ght help the proteins destroy more HIV cDNA and in shorter time. ...

New test to detect rare proteins in blood

...ate with a lower response rate to chemotherapy and shorter survival time after relapse. The Greene lab developed mouse models that carry cancer cells overexpressing Her2/neu. When these cells are implanted into animals they form tumors exactly like breast tumors in humans. Using ELISA, the researchers coul...

Males with elevated levels of testosterone lead shorter lives but have more success siring offspring

...ted levels of testosterone and found that they had shorter lives but that they were very successful at siring more offspring ? even with females who were mated with other males. "The surprising result was that testosterone-treated males had a higher overall fitness than control males," write the authors in ...

For the first time: Longevity modulated without disrupting life-sustaining function

...ocess, and the worms die young. "These mutants are shorter lived because they are unable to respond appropriately to oxidative stress, but they are just as resistant to heat stress as wild type worms whose signaling pathways have not been experimentally manipulated," explained Wolff. "In the future, we ma...

Growth factor-promoting angiogenesis expressed in tumor cells and normal neurons

...on of SCF is associated with a worse prognosis and shorter survival in patients with glioblastomas. SCF expression is not directly linked to tumor cell proliferation but instead encourages the growth of blood vessels needed to support the expanding tumor. Importantly, these findings provide definitive eviden...

New method for identifying microbes

...s level as well. "Sequencing is expensive, so the shorter the section you can sequence and still get useful information, the better," van der Lelie said. "In fact, because these tags are so short, we 'glue' 10 to 30 of them together to sequence all at one time, making this a highly efficient, cost-effective...

Study fishes out new role for prostaglandins

... down significantly. The resulting embryo was also shorter than an untreated embryo. "What is spectacular," said Solnica-Krezel, "is that…if you just put some prostaglandin back in the culture medium, you rescue the phenotype." In another set of embryos, the researchers blocked prostaglandin receptors, E...

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